How to find the correct dose
For Cyanotypes Use a dose of 60 as a starting point. Expose a small test piece using the app. When the exposure is complete move your phone to a safe place and wash the test piece as normal. If you…
How to use AltXpo in a class.
Using Cyanotype as an example
Using the app
The screen will stay on during the exposure so check that you have enough battery to finish the exposure. We recommend to begin with a dose of 60 the first time using the app, press the start button and face…
Controls & Test Exposure (video)
What is dose
Dose represents the amount of daylight to achieve the correct darkness of your finished Cyanotype. Because all phones are all slightly different the number will be unique to your phone model. The result of dose is the darkness of your…
Usable Daylight Hours
As the sun rises and sets the amount of UV rises and falls. This is because as the sun drops in the sky, more UV is filtered out by the atmosphere. Once the sun drops below 45 degrees the amount…